A/N: This is my first Elsanna fic. So basically Kristoff cheats on Anna leaving her. She moves in to the only place she could call home. She'll live With her older sister Elsa until she gets back on her feet.

Rated M for Elsanna incest, some violence, and lots of profanity.

Modern AU so everything about the movie never happen.

Chapter 1

She was going through a fairly rough period of time. Her marriage was coming to an end, and she knew there was nothing she could do about it. In the beginning, Kristoff and Anna had been deliriously happy, just like any newlywed couple. And even when the 'honeymoon' was over as they say, she had come to expect that their sex-life would no doubt diminish a little because of it. The day-to-day pressures of work, trying to keep up the home, took a natural toll on both of them. But it was nothing to worry about.

Then she started seeing the signs. Little by little Kristoff started working late. Working late at a job he never had to work late at before. And then the sudden unexpected trips out of town, that was now a new requirement. And though in the back of her mind she was starting to fear and worry, she did the one thing that perhaps anyone shouldn't do. She pretended it wasn't happening. Anna figured, what I didn't know...wouldn't hurt me.

Anna couldn't have been more wrong.

When it happened, it hit her in the face like a ton of bricks, and to make matters worse, her sister was with her.

The night she found out...

Elsa and Anna had decided to spend the evening together going out to see a movie, and then a late night dinner afterwards. Kristoff was again out of town for the weekend.

"You wanna go out Anna?" Elsa asked.

So rather than spend another night home alone, Elsa had invited Anna out, and she had gladly accepted

"I want nothing more." Anna breathe out.

"That movie was horrible!" Elsa laughed.

"You picked it"

They had enjoyed watching a very typical "chick-flick", and then afterwards went for a walk just a short distance down the street to a quaint little Asian restaurant.

"I prefer chocolate but Chinese will do." Anna smirked

It was cozy and dark, very romantic and she thought about suggesting it to Kristoff after he came home in hopes it might help to spark some interest in their relationship once again.

"Kristoff and I need a place like this." Anna told herself.

Elsa just gave her a coy smile.

"The hostess is kinda cute." Elsa teased.

Anna just smirks, "I don't think so.."

Elsa and Anna gave their names to the cute little Asian hostess, and then sat down to wait for their names to be called.

Anna's smile slightly faded, "I don't know about Kristoff anymore. I'm having doubts about us."

Elsa rested her hand on her sisters thigh, "Don't talk about that. This is a night for us."

The redhead was in dire need of using the restroom, she then asked where it was, and was pointed towards the back. Elsa remained in the waiting room of course in the event their names were soon called.

As Anna turned the corner, she was in for the shock of her life. Ahead of her sat Kristoff and a woman who she knew was his personal assistant. For a moment Anna was confused, wondering if she'd somehow gotten things wrong and that Kristoff hadn't left town, but was doing business in town, and then the young girl remembered him taking his luggage.

Before Anna realized what she was doing, she ducked back behind the wall, worrying and likewise confusing the poor little Asian hostess. she peered out once again just in time to see Kristoff lean over kissing his assistant, her hand suddenly reaching over to rest itself upon his thigh there beneath the table, and then almost as quickly, move a bit further up, obviously and provocatively fondling his groin. The poor redhead wanted to faint, to yell, to scream, to cry... to throw something. But she didn't. As calmly as Anna could, she turned around and walked back out to the waiting area and told Elsa "we were leaving."

"What is it?" Elsa asked in a worried tone.

Elsa knows Anna well enough, that she knew her younger sister was upset and needed to get out of there before telling her why. She made it as far as the side of the building before her legs virtually gave out from beneath her. As she began blubbering, trying to tell her what she had seen, and what was going on, they stood for a moment more as she finally collected herself, now telling her clearly what it was she had seen, which ironically is when the two of them came out.

As they hadn't driven, Elsa and Anna hurriedly made their way deeper into the parking lot, which is when she spotted her husband's car. Like a couple of thieves, they stood over behind a nearby truck just a few cars away, watching them approach, now walking hand in hand together, laughing, kissing like a couple of high school teenagers. If there had been any uncertainty as to what was really going on, there wasn't any now. Especially as the sisters both stood there watching the two of them, reaching the car, opening her door, and then placing his hands upon her breasts for a moment as they kissed once again, before allowing her to slip inside.

"I'm ripping his fucking dick off!" Elsa snarled.

A single tear ran down Anna's cheek, "Don't do anything."

Anna actually had to hold Elsa back this time, her anger well beyond Anna's even at this point. And so they did nothing more than watch the two of them drive off together. Needless to say, Elsa took her home after that, and she sat up the entire night, trying to somehow find a way to rationalize what she'd seen, how she felt, and if there was any way at all to somehow reconcile at least in her own mind, but Anna now knew what her husband was doing on the side.

As he sort of promised, he called her the following day, but considerably earlier than he said he would.

"Hey babe, good morning!" Kristoff said

"Are you coming home?" His wife asked, in a calm voice.

He then said he had now scheduled dinner plans with a couple of the guys he'd met at the convention, and that they'd no doubt stay out late and have a few drinks together.

"What did you have for dinner." She keeps her calm voice.

"Um, just a burger and fries. Nothing special." He chuckles

That's when Anna called him a liar, told him she'd seen him and his sexy little assistant having dinner together.

Like they say, the silence was deafening. She'll give him points on one count. Once he was had, he didn't try and bluff or lie his way out any further.

All he asked her then was, "What do you want to do?"

He gave a few options. The only one he didn't give her was the one where She told him to go fuck himself...or his assistant, and be out of the house within a week.

It was then that she called Elsa," Hey Elsa."

"Hey you. Are you OK?" She inquired.

"I'm divorcing Kristoff."

She asked her sister if she could come and stay with her for a few days until Kristoff got his personal things out of the house, but not before she filed that very same day for divorce, doing so before Kristoff could hide any of their mutual assets. At least she was smart enough in that sense to be very well aware of everything they had, and where it was, though she was piss-poor at knowing where her husband's little prick had been at the time, even though she'd honestly expected it.

Elsa of course, was more than happy to let her come and stay over at their place for a few days while Kristoff and her finalized things, and let him move out, even though he then tried of course to reconcile, asking forgiveness and all that. But...she was wounded, and not in a very forgiving mood at the time either. She was close to kicking his groin, but she was better than that.

The one thing Anna had always envied her sister of, was she was single.

"Hey!" Elsa ran and gave her sister a warm hug.

"You stay here as long as you need to" she kept her grip firmly around her neck.

"I'll take your bags." She insisted

Elsa showed her into the guest room just down the hall from her room, Anna was more than pleased when Elsa told her, she would be spending the night in her room. Something they hadn't done since they were kids, sharing the same bedroom. In a way, felt just like that young girl once again. They stayed up late, drinking, crying, yelling, and screaming even falling into a fit of hysterics at some point before eventually falling asleep.